[SR] Implement prim::CreateObject (#71854)
Summary:
Pull Request resolved: https://github.com/pytorch/pytorch/pull/71854
Support `prim::CreateObject` - this is a native interpreter instruction, so we can't fall back to the JIT for this op.
Test Plan: New unit test exercises creating and modifying custom objects
Reviewed By: d1jang
Differential Revision: D33783759
fbshipit-source-id: 8185ff71b5d441597d712a5d4aab7fc4dddf7034
(cherry picked from commit bd3f52d8e2cd8e20a8d66e2d2b802c1d92088e4e)
